| 摘要 |
PURPOSE:To provide a cutter plate of a shield machine provided with a cutter bit capable of smoothly excavating the clay layer ground. CONSTITUTION:On a cutter plate 3 of a shield machine 1 provided projectingly with a fixed cutter bit 6 along an excavated soil taking-in slit 5 are disposed a plurality of movable cutter bits 7 drawn in and out of the cutter plate 3. The movable cutter 7 is adapted to project forward from the fixed cutter bit 6 and disturb a clay layer of a facing while excavating the clay layer with the fixed cutter bit 6. |
